提高穿层钻孔后期抽采瓦斯浓度技术探讨  

Discussion on Raising Drainage Concentration of Boreholes in Later Stage

作　　者：贾路行 敖世全 魏进涛 

机构地区：[1]重庆大学资源及环境科学学院,重庆400030 [2]贵州官仓矿业开发有限公司,贵州遵义563200

出　　处：《煤炭技术》2017年第10期144-146,共3页Coal Technology

基　　金："十三五"国家重大科技专项(2016ZX05043005;2016ZX05045-004);"十三五"国家重点研发计划项目(2016YFC0801404);国家自然科学基金面上项目(51674050)

摘　　要：为了解决穿层预抽瓦斯钻孔抽采效果差,提高抽采后期瓦斯流量与浓度,从埋管工艺、封孔工艺、调整抽采负压三方面入手研究并进行现场实验应用。结果表明:在预抽钻孔内全程埋管,能够有效防止在抽放一段时间后塌孔导致钻孔堵塞;抽采瓦斯过程中前期后期使用不同的抽放负压,能够较显著地增强抽采效果。In order to solve the difference of gas drainage time, mining stress , increase gas flow rate and concentration in later stage of pumping, the field experiment was carried out from the three aspects： the buried pipe technology, sealing technology and adjusting the negative pressure. The results showed that： pipeline laying in the whole pre drainage, can effectively prevent a long time in the drainage hole collapse caused borehole plugging; gas drainage during the early and late use of different suction pressure, makes significantly enhance the extraction effect.

关 键 词：穿层钻孔 瓦斯抽采 瓦斯发电 注浆封孔 

分 类 号：TD712[矿业工程—矿井通风与安全]